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ONTO · Onto Innovation Inc.

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Market Cap
$12.39B
Shares
49.07M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 694
Total Value: $18,969,288,815
Total Shares: 50,125,352
Showing 1–100 of 712 holdings by value · page 1 of 8

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 694 13F filers · Δ vs Mar 31, 2026
Top Holder
11.0%
Sep 2023 → Jun 2026 · range 10.6% – 15.7%
−0.4 pts
Top 5
26.9%
Sep 2023 → Jun 2026 · range 26.9% – 38.0%
−0.3 pts
Top 10
37.2%
Sep 2023 → Jun 2026 · range 37.2% – 49.8%
−0.4 pts
HHI
250
Sep 2023 → Jun 2026 · range 250 – 493
Broadly held−13

Quarterly Activity

vs Mar 31, 2026
New
171
Increased
205
Decreased
239
Sold Out
59
Unchanged
79
Holder count: +112
Institutional value: +90.5%
Shares held: +3.2%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 712
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 704532 CUSIP 683344105 13F (30d) 461 filings 434 filers Visit website Investor relations